US3716094A - Casting apparatus with regulated cooling station - Google Patents

Casting apparatus with regulated cooling station Download PDF

Info

Publication number
US3716094A
US3716094A US00134196A US3716094DA US3716094A US 3716094 A US3716094 A US 3716094A US 00134196 A US00134196 A US 00134196A US 3716094D A US3716094D A US 3716094DA US 3716094 A US3716094 A US 3716094A
Authority
US
United States
Prior art keywords
station
mould
cooling
temperature
spraying
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US00134196A
Other languages
English (en)
Inventor
C Fuminier
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pont a Mousson SA
Original Assignee
Founderies de Pont a Mousson SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Founderies de Pont a Mousson SA filed Critical Founderies de Pont a Mousson SA
Application granted granted Critical
Publication of US3716094A publication Critical patent/US3716094A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/06—Permanent moulds for shaped castings
    • B22C9/065—Cooling or heating equipment for moulds

Definitions

  • a foundry mould cooling apparatus for a mould turntable conveying the moulds between successive stations including a cleaning station, casting station, a first mould cooling station and a cast part extracting station.
  • a complementary cooling station is provided following on the first cooling station and adapted to supply a complementary amount of cooling water which complements a minimum supply of water by the first cooling station.
  • the amount of complementary water is governed by control means responsive to the temperature of a mould, for example the mould which has just left the cooling stations.
  • the present invention relates to the cooling of moulds employed in foundries so as to achieve a mould temperature which is practically constant throughout a production cycle including internal cleaning of the mould, a possible coating thereof, casting, cooling of the cast part and extraction of the cast part.
  • the moulds it is essential to maintain the casting moulds at a constant temperature, at least in certain cases, for example when the moulds receive a coating of a wet mixture of powdered silica and water. Indeed, if the temperature of the moulds is too high, the water of the coating mixture vaporizes before reaching the mould surface and the solid particles of the mixture, which are insufficiently bound together, are distributed in an 1111- even manner on the mould surface and the coating does not perform its protecting function correctly. On the other hand, if the temperature is too low, the water does not completely vaporize and the coating is too damp when casting so that the water vaporizes in the course of the casting and gives off steam which passes through the molten metal. The cast part may then have flaws requiring its rejection.
  • incidents could occur in the course of production (for example stoppage of the casting or acceleration of the production rate) which disturb the rhythm and regularity of the cooling of the moulds so that their temperature is substantially varied which could also result in rejection of the cast parts.
  • An object of the invention is to provide an apparatus for cooling foundry moulds which avoids these drawbacks.
  • the invention provides a foundry mould cooling apparatus for a mould turntable which conveys the moulds between successive stations for cleaning the moulds, possibly coating the inner face of the moulds, casting, cooling by spraying and extracting the cast part, said apparatus comprising at the spraying stations spraying means for spraying the moulds with water at a variable rate of flow controlled by electrically-operated valves and flow regulators, wherein there is provided, following on at least one permanent spraying station having a constant minimum rate of flow, a spraying station having a complementary rate of flow of water which is controlled through a control by a device measuring the temperature of the moulds.
  • an electricallyoperated valve in the supply conduit of the complementary spraying station is actuated by an electronic servo containing opening and closing instructions for two given temperatures and receiving temperature-indicating signals from a pyrometer which measures the temperature of the last mould which has passed through said complementary spraying station.
  • the spraying by the complementary spraying station is intermittent.
  • a flow regulator in the supply conduit of the complementary spraying station is actuated by an electronic control device controlled by the measurement of the temperature of the last mould which passed through said complementary spraying station.
  • the spraying effected by this station is continuous but at a variable rate of flow.
  • the amount of spraying water supplied is increased if the moulds have a tendency to become overheated and reduced if the moulds have a tendency to cool.
  • the temperature of the moulds is measured in'a region where it is stabilized and is responsive to variations in the production rate, that is, following on the last spraying station. The temperature of the moulds indeed increases when the production rate increases and decreases when the production rate decreases.
  • the amount of spraying water supplied is regulated beforehand, that is, before the mould reaches the station at which its stabilized temperature is measured.
  • the amount of spraying water supplied is constantly adjusted to the required value for maintaining the moulds at a practically constant temperature at the moment of application of the coating and at the moment of casting.
  • FIG. 1 is a diagrammatic plan view of an apparatus according to the invention.
  • FIG. 2 is a perspective diagrammatic view of a detail of the apparatus showing the moulds sprayed by spraying devices having an intermittent water flow or output and the means for measuring the temperature of the moulds.
  • the invention is applied to a turntable '1 carrying moulds or shells 2 used in foundries, for example moulds employed for centrifugal casting.
  • Each mould 2 is mounted on rollers 3 and rotated about its longitudinal axis by a corresponding motor 4.
  • the turntable 1 which is for example circular and has an axis of rotation XX, comprises a ring gear 5 whereby it is driven in rotation about the axis XX in the direction of arrow 1 by a pinion 6 and a motor speedreducer unit 7.
  • the moulds 2, for example seven moulds, are arranged on the turntable 1 and pass in front of successive stations: namely station I for cleaning, that is, brushing the inner face of the mould; station II for coating the inner face of the mould by the projection or spraying of a liquid mixture, for example of silica and bentonite; station III for casting; stations IV, V, V1 for cooling by spraying; station VI I for extracting the cast part.
  • Cold water spraying devices are arranged at the COOllng stations IV, V, VI, the jets being arranged to spray the moulds 2 uniformly.
  • two series of spraying devices 8* and 8 are provided.
  • the series of spraying devices 8 is disposed at the stations IV and V, these being the permanent spraying devices supplied with water by a conduit 9 whose rate of flow or output is regulated by a flow regulator 10 at a minimum value sufficient to ensure a correct mould cooling when the production rate and the metal casting temperature are minimum. This value is determined by trials.
  • a conduit 9 whose rate of flow or output is regulated by a flow regulator 10 at a minimum value sufficient to ensure a correct mould cooling when the production rate and the metal casting temperature are minimum. This value is determined by trials.
  • an electrically-operated valve 11 of known type (shown symbolically) for opening and closing the conduit. The valve 11 remains open in normal operation of the apparatus.
  • the second series of spraying devices 8' comprises at least one spraying device 8 placed at the complementary spraying station VI.
  • the device 8 is supplied with water by a conduit 12 having an intermittent flow or variable output which is complementary to the flow of the aforementioned minimum fiow.
  • This complementary spraying supplies the remaining water so as to cool the moulds in an improved manner when the production rate increases.
  • Water supply control means are provided in the conduit 12 which comprises a fiow regulator 13 for regulating the rate of flow and an electrically-operated valve 14 of known type connected in series with the regulator 13 in the conduit 12 for rendering the flow intermittent.
  • the valve 14 is opened and closed by the effect of the temperature of the moulds 2 at the part extracting station VII through a servo control 15.
  • the servo control 15 is for example electronic but it may be pneumatic. It is of a known commercially-available type and has therefore been shown merely symbolically. It contains opening instructions for an excessively high mould temperature t and closing instructions for an excessively low mould temperature t The temperatures 1 and t are determined by trials. The instructions are shown symbolically by an arrow 16.
  • the control device 15 receives signals representing the temperature of a pyrometer 17 through a transmission line 18.
  • the pyrometer 17 measures the mould at a station where its temperature is stabilized and responsive to variations in the production rate, that is to say, the pyrometer is located at station VII following on the spraying stations IV, V, VI.
  • the servo control 15 transmits the opening and closing signals to the valve 14 through a transmission line 19.
  • the apparatus operates in the following manner:
  • valve 11 In respect of cooling stations IV and V, the valve 11 is open.
  • the first series of spraying devices 8 permanently sprays the moulds 2 with water at a flow rate Q regulated by the flow regulator 10.
  • the flow rate Q is the minimum necessary flow.
  • the spray device or devices 8 of the complementary spraying station VI either sprays the mould 2 at a complementary flow rate Q or does not spray the mould, depending on whether the valve 14 is open or closed.
  • the valve 14 is open if the temperature of the mould 2 measured by the pyrometer 17 at station VII is sufficiently high, for example higher than t It is closed if the temperature is too low, for example below t
  • the flow Q is constant and the flow Q is therefore intermittent.
  • the correction of the spraying flow rate is effected at station VI in respect of mould 2 whose temperature is not read off directly, since it is not stabilized, but is, as it were, previously estimated by measuring the temperature of the preceding mould 2 at station VII so as to ascertain the influence of the spraying on the cooling.
  • the mould 2 sprayed at station VI in turn. reaches the extracting station VII, its temperature is in turn measured and may possibly result in the valve 14 elfecting a further correction so as to provide a corrected cooling of the following mould.
  • the pyrometer 17 measures each mould 2 at station VII which follows the spraying stations IV, V, VI, the temperature of the mould is measured in a region where it is stabilized but nevertheless responsive to variations in the production rate, this temperature tending to increase when the production rate increases and decreases when the production rate decreases. For this reason it is in this region that the temperature variations can best be detected in that the correction by cooling can be checked.
  • the temperature of the moulds is practically stabilized at the coating station II and casting station III and it is possible to considerably improve the casting conditions and thus avoid the aforementioned rejection of the cast parts.
  • the pyrometer measure not the mould 2 directly but, for reasons of convenience, the cast part extracted from the mould at station VII in a region where it is separated from the mould and open to the free air, whereby to ascertain the temperature of the mould indirectly.
  • the water supply control means could consist solely of the flow regulator 13 instead of the valve 14 which is controlled by the control device 15.
  • a line 19a shown in dot dash line in FIG. 1, connects the control device 15 to the regulator 13, the part of the line 19 beyond line 19a being eliminated.
  • a foundry mould cooling apparatus in combination with a mould turntable which is rotatable and carries a plurality of moulds and is combined with means for rotating the turntable so that each of said moulds is conveyed in a path in turn to each one of a plurality of successive stations which are circumferentially spaced part from each other equal distances, said stations including a station for cleaning the inside of the mould prior to casting, a station for casting a part in the mould, and a station for extracting the cast part from the mould, said cooling apparatus comprising a plurality of cooling stations which are part of said successive stations and are interposed between said casting station and said extracting station, a cooling station of said cooling stations which is adjacent said extracting station being a complementary cooling station having a complementary water spraying device for spraying the outside of the mould, and the remainder of said cooling stations having water spraying means for spraying the outside of the mould with a given amount of water, said cooling apparatus further comprising adjustable water supply control means for regulating the amount of water issuing from said complementary spraying device,
  • said water supply control means comprise selectively opening and closing valve means and said control device comprises an electronic servo-device adapted to selectively open and close said valve means at two predetermined reference temperatures
  • said temperature measuring device comprises a pyrometer which is positioned and arranged to measure a temperature related to the temperature of a mold which has left the complementary cooling station with respect to the direction in which the moulds are conveyed.
  • valve means are electrically controlled means and a transmission line connects said valve means to said servo-device and said pyrometer is adapted to produce electrical temperature indicating signals and is connected through a transmission line to said servo device.
  • said water supply control means comprise a water flow regulator for regulating the rate of flow of water from said complementary water spraying device.
  • a foundry mould cooling apparatus in combination with a mould turntable which is rotatable and carries a plurality of moulds and is combined with means for rotating the turntable so that each of said moulds is conveyed in a path in turn to each one of a plurality of successive stations which are circumferentially spaced apart from each other equal distances, said stations including a station for cleaning the inside of the mould prior to casting a station for coating the inside surface of the mould, a station for casting a part in the mould, and a station for extracting the cast part from the mould, said cooling apparatus comprising a plurality of cooling stations which are part of said successive stations and are interposed between said casting station and said extracting station, a cooling station of said cooling stations which is adjacent said extracting station being a complementary cooling station having a complementary water spraying devices for spraying the outside of the mould, and the other cooling stations of said cooling stations having water spraying means for spraying the outside of the mould with a given amount of water, said cooling apparatus further comprising adjustable water supply control means for regulating the

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Spray Control Apparatus (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Casting Devices For Molds (AREA)
US00134196A 1970-04-17 1971-04-15 Casting apparatus with regulated cooling station Expired - Lifetime US3716094A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR707013981A FR2085409B1 (enExample) 1970-04-17 1970-04-17

Publications (1)

Publication Number Publication Date
US3716094A true US3716094A (en) 1973-02-13

Family

ID=9054157

Family Applications (1)

Application Number Title Priority Date Filing Date
US00134196A Expired - Lifetime US3716094A (en) 1970-04-17 1971-04-15 Casting apparatus with regulated cooling station

Country Status (4)

Country Link
US (1) US3716094A (enExample)
ES (1) ES390667A1 (enExample)
FR (1) FR2085409B1 (enExample)
GB (1) GB1344390A (enExample)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52124420A (en) * 1976-04-13 1977-10-19 Pont A Mousson Centrifugal casting device for large diameter tube
US5040590A (en) * 1990-07-20 1991-08-20 Brandriff Robert C Method of cooling a centrifugal casting mold
US5190093A (en) * 1991-12-13 1993-03-02 American Cast Iron Pipe Company Method for casting iron pipe
EP0744233A3 (en) * 1995-05-22 1997-02-26 Howmet Corp Removing the ceramic shell from a casting
EP0941788A3 (en) * 1998-03-09 2004-03-03 Acheson Industries, Inc. Process and device for preparing the walls of a mold for molding or shaping to make them ready for the next molding cycle, spray element with centrifugal atomization and air guidance, and use of this spray element for spraying essentially solvent-free mold wall treatment agent
CN117066453A (zh) * 2023-10-16 2023-11-17 普洛特(烟台)汽车科技有限公司 一种汽车刹车盘铸造成型处理设备

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
PT86954B (pt) * 1988-03-11 1994-07-29 Antonio Pinto Barbedo De Magal Processo para controlar a distribuicao de temperaturas de moldacoes permanentes e de pecas vazadas ou injectadas nas referidas moldacoes ou coquilhas
CN112916805B (zh) * 2021-01-14 2022-10-18 万泰和汽车材料（武汉）有限公司 一种铝水浇铸方法

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52124420A (en) * 1976-04-13 1977-10-19 Pont A Mousson Centrifugal casting device for large diameter tube
US4116260A (en) * 1976-04-13 1978-09-26 Pont-A-Mousson S.A. Installation for the centrifugal casting of large pipes
US5040590A (en) * 1990-07-20 1991-08-20 Brandriff Robert C Method of cooling a centrifugal casting mold
US5190093A (en) * 1991-12-13 1993-03-02 American Cast Iron Pipe Company Method for casting iron pipe
EP0744233A3 (en) * 1995-05-22 1997-02-26 Howmet Corp Removing the ceramic shell from a casting
US5678583A (en) * 1995-05-22 1997-10-21 Howmet Research Corporation Removal of ceramic shell mold material from castings
US5913354A (en) * 1995-05-22 1999-06-22 Howmet Research Corporation Removal of ceramic shell mold material from castings
EP0941788A3 (en) * 1998-03-09 2004-03-03 Acheson Industries, Inc. Process and device for preparing the walls of a mold for molding or shaping to make them ready for the next molding cycle, spray element with centrifugal atomization and air guidance, and use of this spray element for spraying essentially solvent-free mold wall treatment agent
CN117066453A (zh) * 2023-10-16 2023-11-17 普洛特(烟台)汽车科技有限公司 一种汽车刹车盘铸造成型处理设备
CN117066453B (zh) * 2023-10-16 2023-12-19 普洛特(烟台)汽车科技有限公司 一种汽车刹车盘铸造成型处理设备

Also Published As

Publication number Publication date
FR2085409A1 (enExample) 1971-12-24
GB1344390A (en) 1974-01-23
FR2085409B1 (enExample) 1973-08-10
ES390667A1 (es) 1973-06-16

Similar Documents

Publication Publication Date Title
US4721154A (en) Method of, and apparatus for, the continuous casting of rapidly solidifying material
US3716094A (en) Casting apparatus with regulated cooling station
GB1140934A (en) Improvements in and relating to the continuous casting of metal
GB1448383A (en) Method and apparatus for controlling the cooling of a continu ously cast strand
US4009750A (en) Apparatus for controlling the cooling of a strand emanating from a continuous casting mold
US3824069A (en) Method of increasing the cooling effect of a rotary kiln-satellite cooler and device for carrying out the method
JPS59183962A (ja) 連続鋳造プラントを制御する方法及び装置
US3411568A (en) Rotating machine structure with recycling cooling circuit
US3759309A (en) Method of and apparatus for cooling continuously cast metal
US2797459A (en) Method of cooling of centrifugal sleeve molds
JPS6049850A (ja) 連続鋳造設備における二次冷却材流量制御方法
US3506060A (en) Method for continuous centrifugal casting of tubular metal articles
JPS57187147A (en) Cooling drum for production of amorphous or fine crystalline metal
GB1029203A (en) Apparatus for cooling foundry sands in process
GB801547A (en) Improvements relating to continuous casting machines
JPS56136215A (en) Method and apparatus for feedback control of water cooling for steel material in rolling line
JPS5614068A (en) Wet type cooling method of casting
US3766967A (en) Apparatus for preliminary cooling of continuous casting machine
JPS5868461A (ja) 遠心鋳造管の冷却方法及びその装置
JP3322388B2 (ja) 鋳物砂処理用の散水装置
JPS5886961A (ja) ロ−タリ−キヤスタの鋳造輪冷却装置
SU757253A1 (ru) Устройство для автоматического охлаждения кокилей поточной линии литья i
JPS6054257A (ja) 連続鋳造の凝固完了点位置制御方法
US703358A (en) Strip-metal-casting machine.
JPS56151143A (en) Horizontal continuous casting plant